A syringe (10) having a syringe body (20) having an inner wall (21), and a piston (100) sliding along the inner wall of the syringe body along the longitudinal axis (A1) of the syringe, the piston comprising a piston head (110) and an actuating rod (120) connected to the piston head, the syringe being characterized in that: - the syringe body comprises at least one stop (32) located along the the inner wall of the syringe body, the abutment being designed to leave at least one virgin surface (22) on the inner wall of the syringe body, - the actuating rod of the piston comprises, on its outer surface, at least one rack (122) disposed longitudinally along the actuating rod (120), the rack (122) including protruding notches (122A), and in that - the abutment and the projecting notches are shaped and formed for, when the rise of the piston in the syringe body, when the stop e The rack and the rack are facing each other, allow the piston a notch upwardly notch along the syringe body, and prevent the piston from coming back down by pressing on the actuating rod except to disengage the rack by rotation. plunger in the syringe body about the longitudinal axis to bring the rack opposite the blank surface of the inner wall of the syringe body.Seringue (10) comportant un corps de seringue (20) présentant une paroi interne (21), et un piston (100) coulissant le long de la paroi interne du corps de seringue suivant l'axe longitudinal (A1) de la seringue, le piston comprenant une tête de piston (110) et une tige d'actionnement (120) raccordée à la tête de piston, la seringue étant caractérisée en ce que : - le corps de seringue comporte au moins une butée (32) située le long de la paroi interne du corps de seringue, la butée étant conçue pour laisser au moins une surface vierge (22) sur la paroi interne du corps de seringue, - la tige d'actionnement du piston comporte, sur sa surface externe, au moins une crémaillère (122) disposée longitudinalement le long de la tige d'actionnem
